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Weather in Swindon for September 2026

Your guide to Swindon weather in September - trends and predictions

    Temperatures

  • Until now, September 2026 in Swindon is slightly cooler than the historical average by 1.7 °C.

  • Expect cooler weather in the next days in Swindon with the forecast suggesting a temperature of 18.8 °C, lower than the historical average.

  • In general, the average temperature in Swindon at the beginning of September is 20.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 16.3 °C by the end of September.

    • Rain 🌧️

  • Swindon experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 76.1 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
9
Dry days
Average rainy days
21
Rainy days
Average snowy days
0
Snow days
Average temperatures
18°/10°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Swindon Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Light rain shower
20°
2
Overcast
20°
3
Light rain shower
21°
4
Sunny
19°
5
Sunny
20°
6
Overcast
23°
7
Sunny
23°
8
Partly cloudy
21°
9
Overcast
21°
10
Partly cloudy
20°
11
Light rain shower
17°
12
Overcast
22°
13
Patchy rain possible
20°
14
Partly cloudy
23°
15
Patchy rain possible
22°
16
Sunny
16°
17
Overcast
16°
18
Overcast
17°
19
Patchy rain possible
16°
20
Sunny
15°
21
Sunny
17°
22
Overcast
18°
23
Sunny
21°
24
Overcast
22°
25
Patchy rain possible
16°
26
Patchy light drizzle
16°
27
Fog
14°
28
Overcast
15°
29
Partly cloudy
15°
30
Overcast
16°

Temperatures trend during September in Swindon

See the weather trend as well as the moving average line

September weather in Swindon day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 20° /11° 4.8 mm 4
2 Sept. Overcast
Overcast
 20° /12° 2.3 mm 4
3 Sept. Light rain shower
Light rain shower
 21° /12° 1.8 mm 4
4 Sept. Sunny
Sunny
 19° /12° 2.4 mm 4
5 Sept. Sunny
Sunny
 20° /11° 7.1 mm 5
6 Sept. Overcast
Overcast
 23° /13° 2.1 mm 5
7 Sept. Sunny
Sunny
 23° /13° 0.6 mm 4
8 Sept. Partly cloudy
Partly cloudy
 21° /13° 11 mm 5
9 Sept. Overcast
Overcast
 21° /11° 0.2 mm 5
10 Sept. Partly cloudy
Partly cloudy
 20° /11° 1.3 mm 4
11 Sept. Light rain shower
Light rain shower
 17° /9° 1.6 mm 4
12 Sept. Overcast
Overcast
 22° /11° 0.4 mm 4.2
13 Sept. Patchy rain possible
Patchy rain possible
 20° /16° 1.5 mm 4.1
14 Sept. Partly cloudy
Partly cloudy
 23° /13° 0.1 mm 3.1
15 Sept. Patchy rain possible
Patchy rain possible
 22° /12° 1.4 mm 5
16 Sept. Sunny
Sunny
 16° /10° 0.5 mm 4
17 Sept. Overcast
Overcast
 16° /10° 0 mm 4
18 Sept. Overcast
Overcast
 17° /10° 0.2 mm 4
19 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 13.2 mm 5
20 Sept. Sunny
Sunny
 15° /8° 3.7 mm 5
21 Sept. Sunny
Sunny
 17° /11° 11.8 mm 5
22 Sept. Overcast
Overcast
 18° /10° 0 mm 5
23 Sept. Sunny
Sunny
 21° /14° 0.5 mm 6
24 Sept. Overcast
Overcast
 22° /14° 0 mm 6
25 Sept. Patchy rain possible
Patchy rain possible
 16° /8° 1.4 mm 4
26 Sept. Patchy light drizzle
Patchy light drizzle
 16° /8° 2.4 mm 4
27 Sept. Fog
Fog
 14° /8° 3.2 mm 3
28 Sept. Overcast
Overcast
 15° /8° 0.8 mm 4
29 Sept. Partly cloudy
Partly cloudy
 15° /7° 3.7 mm 4
30 Sept. Overcast
Overcast
 16° /8° 3.7 mm 4
Next
Important Notice
Our weather forecast for Swindon in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Swindon forecast closer to your planned date for the most up-to-date weather information.
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Swindon in September - FAQ

What are the expected maximum and minimum temperatures in Swindon during September?
Enjoy moderate daytime temperatures of up to 18° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.

How much rainfall should be expected in Swindon during September?
Moderate rainfall is anticipated in Swindon during September, with a total of 76.1 mm spread over approximately 21 days. Considering plans for rainy days is advisable.

What are the typical wind conditions in Swindon during September?
The average wind speed in Swindon during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Swindon

Explore the daily rainfall trends and prepare for Swindons September weather 💧
Typically, Swindon has 21 rainy days in September with a total of 76.1 mm of rainfall.

UV exposure in Swindon during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Get accurate weather forecasts for Swindon, located at latitude 51.558 and longitude -1.781. Stay updated with localized weather information tailored for Swindon.

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